BARRY COUNTY, MI -- A day after federal agents executed a search warrant at the Barry County Sheriff's Department, authorities are mum on what prompted the search, or whether it involves any alleged criminal activity.

Federal agents were seen working at the sheriff's department Wednesday, March 12, and reporters on-scene found a front window closed to the public.

Kaye Hooker, spokeswoman for the U.S. Attorney's Office, told The Grand Rapids Press/MLive that the U.S. Attorney's Office would not confirm an investigation was taking place. The agency does not comment on on-going investigations, Hooker said.

Wednesday evening, the sheriff told WOOD-TV his department is working with the FBI on an investigation, but would not comment any further on what is involved.

He told the Grand Rapids news station the department is "OK" and when asked if anything illegal was happening in his department, responded simply, "no."